摘要
本文利用代数应力方程,结合连续方程和湍动能的定义,直接推出雷诺应力的显式表达式,综合k—ε模型和代数应力模型的优点,提出一个效果好的湍流数学模型——混合k—ε模型。计算结果表明:该模型既具有代数应力模型适用范围广,计算精度高的长处,又具有k—ε模型结构简单,收敛速度快,计算省时的优点。
In this paper, explicit expressions of Reynolds stresses are deduced directly form algebraic-stress equation, by using continuity equation and the definition of turbulent kinetic energy. Based on these expressions, as well asκ - εModel and Algebraic-Stress Model (ASM), a hybrid κ - ε turbulence model is proposed. The computational results of a rearward-facing step flow show that this new model has not only the advantages of ASM, such as higher precision and wider applicable range, but also the advantages of κ- ε Model, such as better convergence and less computer time.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
1992年第A12期571-576,共6页
Chinese Journal of Hydrodynamics
关键词
混合κ-ε模型
κ-ε模型
湍流
hybrid κ-ε model, algebraic-stress model, κ-ε model.
